如何使用Selenium单击网页上的打印按钮 [英] How to click on the print button on a web page using Selenium
问题描述
我要单击此页面中的打印按钮:
I want to click on the print button in this page :
然后保存PDF ...
and then save the PDF...
这是单击按钮的代码:
String url = "https://www.google.com/maps/dir/40.4515849,-3.6903752/41.380896,2.1228198/@40.4515849,-3.6903752/am=t/?hl=en";
WebDriver driver = new HtmlUnitDriver();
driver.get(url);
System.out.println(driver.getTitle());
System.out.println(driver.getCurrentUrl());
WebElement element = driver.findElement(By.xpath("//*[@id=\"text-mode-options-header\"]/div/div/div[2]/div[2]/div/button[1]"));
element.click();
System.out.println("Page title is: " + driver.getTitle());
driver.quit();
但出现以下错误:
Exception in thread "main" org.openqa.selenium.NoSuchElementException: Unable to locate a node using //*[@id="text-mode-options-header"]/div/div/div[2]/div[2]/div/button[1]
For documentation on this error, please visit: http://seleniumhq.org/exceptions/no_such_element.html
Build info: version: '2.43.1', revision: '5163bce', time: '2014-09-10 16:27:58'
Driver info: driver.version: HtmlUnitDriver
at org.openqa.selenium.htmlunit.HtmlUnitDriver.findElementByXPath(HtmlUnitDriver.java:1057)
at org.openqa.selenium.By$ByXPath.findElement(By.java:357)
at org.openqa.selenium.htmlunit.HtmlUnitDriver$5.call(HtmlUnitDriver.java:1575)
at org.openqa.selenium.htmlunit.HtmlUnitDriver$5.call(HtmlUnitDriver.java:1)
at org.openqa.selenium.htmlunit.HtmlUnitDriver.implicitlyWaitFor(HtmlUnitDriver.java:1251)
at org.openqa.selenium.htmlunit.HtmlUnitDriver.findElement(HtmlUnitDriver.java:1572)
at org.openqa.selenium.htmlunit.HtmlUnitDriver.findElement(HtmlUnitDriver.java:532)
at com.controlstation.start.Main.main(Main.java:24)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:134)
如何使用Selenium做到这一点?还有另一种方法吗?谢谢.
how can I do this using Selenium? is there another way? thanks.
推荐答案
这是我的见识.
首先，您需要等待页面加载才能与Print按钮进行交互.最好的方法是使用内置机制:硒 waits -等待Print按钮可单击:
First of all, you need to wait for the page to load in order to interact with the Print button. The best way to go is to use built-in mechanism: selenium waits - wait for the Print button to be clickable:
// open print dropdown
WebDriverWait wait = new WebDriverWait(driver, 10);
wait.until(ExpectedConditions.elementToBeClickable(By.cssSelector("button.print-button"))).click();
// click print button
WebElement printButton = driver.findElement(By.cssSelector("button.print-popup-button"));
printButton.click();
好的，如果您使用 ChromeDriver :
Okay, if you run it using ChromeDriver:
package com.company;
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.chrome.ChromeDriver;
import org.openqa.selenium.support.ui.ExpectedConditions;
import org.openqa.selenium.support.ui.WebDriverWait;
public class Main {
public static void main(String[] args) {
String url = "https://www.google.com/maps/dir/40.4515849,-3.6903752/41.380896,2.1228198/@40.4515849,-3.6903752/am=t/?hl=en";
WebDriver driver = new ChromeDriver();
driver.get(url);
// open print dropdown
WebDriverWait wait = new WebDriverWait(driver, 10);
wait.until(ExpectedConditions.elementToBeClickable(By.cssSelector("button.print-button"))).click();
// click print button
WebElement printButton = driver.findElement(By.cssSelector("button.print-popup-button"));
printButton.click();
// now what?
}
}
很遗憾，您会看到 Chrome打印预览对话框，该对话框超出了硒的范围:
You'll see the Chrome Print Preview dialog, which is, unfortunately, out of scope for selenium:
但是，如果您检查可用的 Chrome参数，那还是有希望的. ，您会看到其中一个相关的内容:
But, there is a hope, if you examine available Chrome arguments, you would see that there is the relevant one:
-disable-print-preview-禁用打印预览(用于测试以及不喜欢我们的用户.:[)
--disable-print-preview - Disables print preview (For testing, and for users who don't like us. :[ )
好吧，让我们尝试一下:
Okay, let's try it out:
ChromeOptions options = new ChromeOptions();
options.addArguments("--disable-print-preview");
WebDriver driver = new ChromeDriver(options);
driver.get(url);
现在，将显示一个系统打印对话框:
Now, there is a system print dialog being shown:
硒也无法控制它.所以，不，没有希望.哦，等等！
Selenium cannot control it too. So, nope, there is no hope. Oh, wait!
好的，如果我们不在硒的范围之内，让我们使用可以帮助我们单击对话框中的Print按钮的工具-
Okay, if we are out of scope of selenium, let's use tools that can help us to click that Print button in the dialog - Robot class:
此类用于为以下对象生成本机系统输入事件: 测试自动化，自运行演示和其他目的 需要控制鼠标和键盘的应用程序.
This class is used to generate native system input events for the purposes of test automation, self-running demos, and other applications where control of the mouse and keyboard is needed.
我们将初始化Robot，并在出现打印对话框时发送Enter键:
We'll initialize the Robot and will send Enter key when the print dialog would show up:
package com.company;
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.chrome.ChromeDriver;
import org.openqa.selenium.support.ui.ExpectedConditions;
import org.openqa.selenium.support.ui.WebDriverWait;
import java.awt.*;
import java.awt.event.KeyEvent;
public class Main {
public static void main(String[] args) throws AWTException, InterruptedException {
String url = "https://www.google.com/maps/dir/40.4515849,-3.6903752/41.380896,2.1228198/@40.4515849,-3.6903752/am=t/?hl=en";
Robot r = new Robot();
r.delay(1000);
WebDriver driver = new ChromeDriver();
driver.get(url);
// open print dropdown
WebDriverWait wait = new WebDriverWait(driver, 10);
wait.until(ExpectedConditions.elementToBeClickable(By.cssSelector("button.print-button"))).click();
// click print button
WebElement printButton = driver.findElement(By.cssSelector("button.print-popup-button"));
printButton.click();
Thread.sleep(2000);
r.keyPress(KeyEvent.VK_ENTER);
r.keyRelease(KeyEvent.VK_ENTER);
}
}
要使用其他选项:
另请参阅:
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